Derivation of design rules for innovative shear connectors in steel‐concrete composites through the systematic use of non‐linear finite element analysis (FEA)

Abstract

Derivation of design rules for innovative shear connectors in steel-concrete composites through the systematic use of non-linear finite element analysis (FEA)Today, the development of innovative shear connectors for steelconcrete composites is accompanied by a large number of experimental investigations, which are obligatory when proposing suitable design formula and carving out their limitations of use. Using the example of the so-called pin connector, the present paper illustrates to what extent validated finite element models of novel shear connectors can be used to replace expensive and time-consuming shear tests and how these finite element models can support the deduction of design concepts. The pin connector considered was developed for connecting steel sections to very slender high-strength concrete slabs in which conventional shear connectors such as headed studs cannot be used due to the limited embedment depth. In order to clarify the shear behaviour and load-carrying mechanisms of these novel connectors, non-linear finite element models were set up using the commercial FE software Abaqus. Subsequently, the FE models were used to perform systematic parametric studies. This paper describes the numerical results and also explains the stepwise development of an entire engineering model for determining the longitudinal shear capacity of small-scale pin connectors, including all the necessary limitations of use. The proposed modelling strategy and the methodology for the deduction of design rules can be transferred and assigned to other types of shear connectors.

Residual Axial Bearing Capacity of Concrete-Filled Circular Steel Tubular Columns (CFCSTCs) after Transverse Impact

“…In the normal direction, a hard contact model is used. A Coulomb friction model is applied in the tangential direction and the dynamic friction coefficient of 0.6 and static friction coefficient of 0.5, proposed in [33,[48][49][50][51], are used for the interface between the steel tube and core concrete. In addition, the *TIE option in ABAQUS is adopted to simulate the welding lines between steel tube and steel plates.…”

Experimental and Parametric Study on the Pull-Out Resistance of a Notched Perfobond Shear Connector

“…The shear connection between steel and concrete is critical for the design of composite structures. Among the various types of shear connectors in the literature [1][2][3][4][5][6][7][8], the perfobond shear connector is one of the most competitive shear connectors in practice, having a great shear resistance, shear stiffness, and fatigue strength [9,10]. The conventional perfobond shear connector is a flat steel plate which makes circular holes.…”

Verification of structural performance of connections between reinforced concrete shear walls and outriggers in high‐rise buildings

“…Based on numerous studies on shear studs used in composite members, the design strength of shear studs was initially proposed based on static load tests in the 1950s . Moreover, it is known from numerous experiments and finite element analyses (FEAs) that the strength of a shear stud is influenced by its cross‐sectional area, height, and tensile strength and the elastic modulus and compressive strength of concrete . Furthermore, the failure modes of shear studs have been observed, and the load transfer through shear studs has been studied through static and fatigue tests .…”

“…1,2 Moreover, it is known from numerous experiments and finite element analyses (FEAs) that the strength of a shear stud is influenced by its cross-sectional area, height, and tensile strength and the elastic modulus and compressive strength of concrete. [3][4][5][6] Furthermore, the failure modes of shear studs have been observed, and the load transfer through shear studs has been studied through static and fatigue tests. [7][8][9][10][11] The relative displacement and initial tangential stiffness have been compared and analyzed based on the results of the statistical analysis of the load-displacement curves obtained from static tests.…”